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Diffstat (limited to '')
| -rw-r--r-- | misc-utils/lsfd.h | 247 |
1 files changed, 247 insertions, 0 deletions
diff --git a/misc-utils/lsfd.h b/misc-utils/lsfd.h new file mode 100644 index 0000000..ea1c342 --- /dev/null +++ b/misc-utils/lsfd.h @@ -0,0 +1,247 @@ +/* + * lsfd(1) - list file descriptors + * + * Copyright (C) 2021 Red Hat, Inc. All rights reserved. + * Written by Masatake YAMATO <yamato@redhat.com> + * + * Very generally based on lsof(8) by Victor A. Abell <abe@purdue.edu> + * It supports multiple OSes. lsfd specializes to Linux. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it would be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software Foundation, + * Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + */ +#ifndef UTIL_LINUX_LSFD_H +#define UTIL_LINUX_LSFD_H + +#include <stdbool.h> +#include <sys/stat.h> +#include <dirent.h> +#include <inttypes.h> + +#include "list.h" +#include "path.h" +#include "strutils.h" + +/* + * column IDs + */ +enum { + COL_AINODECLASS, + COL_ASSOC, + COL_BLKDRV, + COL_CHRDRV, + COL_COMMAND, + COL_DELETED, + COL_DEV, + COL_DEVTYPE, + COL_ENDPOINTS, + COL_FD, + COL_FLAGS, + COL_INODE, + COL_INET_LADDR, + COL_INET_RADDR, + COL_INET6_LADDR, + COL_INET6_RADDR, + COL_KNAME, + COL_KTHREAD, + COL_MAJMIN, + COL_MAPLEN, + COL_MISCDEV, + COL_MNT_ID, + COL_MODE, + COL_NAME, + COL_NETLINK_GROUPS, + COL_NETLINK_LPORT, + COL_NETLINK_PROTOCOL, + COL_NLINK, + COL_NS_NAME, + COL_NS_TYPE, + COL_PACKET_IFACE, + COL_PACKET_PROTOCOL, + COL_PARTITION, + COL_PID, + COL_PIDFD_COMM, + COL_PIDFD_NSPID, + COL_PIDFD_PID, + COL_PING_ID, + COL_POS, + COL_RAW_PROTOCOL, + COL_RDEV, + COL_SIZE, + COL_SOCK_LISTENING, + COL_SOCK_NETNS, + COL_SOCK_PROTONAME, + COL_SOCK_STATE, + COL_SOCK_TYPE, + COL_SOURCE, + COL_STTYPE, + COL_TCP_LADDR, + COL_TCP_RADDR, + COL_TCP_LPORT, + COL_TCP_RPORT, + COL_TID, + COL_TYPE, + COL_UDP_LADDR, + COL_UDP_RADDR, + COL_UDP_LPORT, + COL_UDP_RPORT, + COL_UDPLITE_LADDR, + COL_UDPLITE_RADDR, + COL_UDPLITE_LPORT, + COL_UDPLITE_RPORT, + COL_UID, /* process */ + COL_UNIX_PATH, + COL_USER, /* process */ + COL_FUID, /* file */ + COL_OWNER, /* file */ + LSFD_N_COLS /* This must be at last. */ +}; + +/* + * Process structure + */ +enum association { + ASSOC_EXE = 1, + ASSOC_CWD, + ASSOC_ROOT, + ASSOC_NS_CGROUP, + ASSOC_NS_IPC, + ASSOC_NS_MNT, + ASSOC_NS_NET, + ASSOC_NS_PID, + ASSOC_NS_PID4C, + ASSOC_NS_TIME, + ASSOC_NS_TIME4C, + ASSOC_NS_USER, + ASSOC_NS_UTS, + ASSOC_MEM, /* private file mapping */ + ASSOC_SHM, /* shared file mapping */ + N_ASSOCS, +}; + +struct proc { + pid_t pid; + struct proc * leader; + char *command; + uid_t uid; + ino_t ns_mnt; + struct list_head procs; + struct list_head files; + unsigned int kthread: 1; +}; + +struct proc *get_proc(pid_t pid); + +/* + * File class + */ +struct file { + struct list_head files; + const struct file_class *class; + int association; + char *name; + struct stat stat; + mode_t mode; + struct proc *proc; + + uint64_t pos; + uint64_t map_start; + uint64_t map_end; + + unsigned int sys_flags; + unsigned int mnt_id; +}; + +#define is_opened_file(_f) ((_f)->association >= 0) +#define is_mapped_file(_f) (is_association((_f), SHM) || is_association((_f), MEM)) +#define is_association(_f, a) ((_f)->association < 0 && (_f)->association == -ASSOC_ ## a) + +struct file_class { + const struct file_class *super; + size_t size; + void (*initialize_class)(void); + void (*finalize_class)(void); + bool (*fill_column)(struct proc *proc, + struct file *file, + struct libscols_line *ln, + int column_id, + size_t column_index); + int (*handle_fdinfo)(struct file *file, const char *key, const char* value); + void (*attach_xinfo)(struct file *file); + void (*initialize_content)(struct file *file); + void (*free_content)(struct file *file); + const struct ipc_class *(*get_ipc_class)(struct file *file); +}; + +extern const struct file_class file_class, cdev_class, bdev_class, sock_class, unkn_class, fifo_class, + nsfs_file_class; + +/* + * IPC + */ +struct ipc { + const struct ipc_class *class; + struct list_head endpoints; + struct list_head ipcs; +}; + +struct ipc_endpoint { + struct ipc *ipc; + struct list_head endpoints; +}; + +struct ipc_class { + unsigned int (*get_hash)(struct file *file); + bool (*is_suitable_ipc)(struct ipc *ipc, struct file *file); + void (*free)(struct ipc *ipc); +}; + +struct ipc *get_ipc(struct file *file); +void add_ipc(struct ipc *ipc, unsigned int hash); + +/* + * Name managing + */ +struct name_manager; + +struct name_manager *new_name_manager(void); +void free_name_manager(struct name_manager *nm); +const char *get_name(struct name_manager *nm, unsigned long id); +unsigned long add_name(struct name_manager *nm, const char *name); + +const char *get_partition(dev_t dev); +const char *get_blkdrv(unsigned long major); +const char *get_chrdrv(unsigned long major); +const char *get_miscdev(unsigned long minor); +const char *get_nodev_filesystem(unsigned long minor); + +static inline void xstrappend(char **a, const char *b) +{ + if (strappend(a, b) < 0) + err(XALLOC_EXIT_CODE, _("failed to allocate memory for string")); +} + +static inline void xstrputc(char **a, char c) +{ + char b[] = {c, '\0'}; + xstrappend(a, b); +} + +/* + * Net namespace + */ +void load_sock_xinfo(struct path_cxt *pc, const char *name, ino_t netns); +bool is_nsfs_dev(dev_t dev); + +#endif /* UTIL_LINUX_LSFD_H */ |